Cutting of titanium alloy-turning of titanium alloy cutting consumption
Introduction
Titanium alloy is an important material for modern industry, with excellent mechanical properties. It is widely used in aerospace, artillery and marine engineering, nuclear industry, shipbuilding, electronics and other fields. With the widespread application of titanium alloy, the cutting technology of titanium alloy has become increasingly important. This paper mainly introduces the cutting technology of titanium alloy in detail, including factors affecting cutting consumption, technology parameters and cutting quality, etc.
Factors affecting cutting consumption
1. Cutting tool material
Cutting tools used for titanium alloys are usually made of high speed steel, tungsten carbide and polycrystalline diamond. The choice of cutting tool material depends on the processing demand and workpiece material. Compared with high speed steel, tungsten carbide cutting tool has higher hardness and wear resistance, so it is suitable for the machining of harder titanium alloy. Polycrystalline cutting tools have the characteristics of high heat dissipation rate and high wear resistance, so they are suitable for the dry turning of titanium alloy parts.
2. Cutting parameters
Cutting parameters, such as cutting speed, feed rate, depth of cut and cutting force, also affect the cutting performance of titanium alloy. Usually, a larger cutting speed can improve the cutting efficiency and reduce the cutting chipping phenomenon. However, when the cutting speed is too high, it will increase the cutting heat and cause serious deformation or cracking of the workpiece. The feed rate should be increased as much as possible to reduce the cutting heat, but it should be noted that too large feed rate will result in poor cutting quality and fatal wear of the tool surface. The cutting force should be minimized as much as possible to reduce the deformation of the workpiece and affect the accuracy of machining.
3. Cutting Fluid
When cutting titanium alloy, appropriate cutting fluid is necessary to reduce cutting heat, reduce cutting force and improve machining quality. Common cutting fluids include emulsions, water-soluble oils, synthetic cutting fluids and so on. When selecting the cutting fluid, the rationality of cutting parameters should be fully considered.
Turning of titanium alloy
By the choice of cutting tool, lubricant and parameters, the turning of titanium alloy can be achieved. In the construction of titanium alloy turning process, generally firstly according to the cutting parameters, material composition, structure of titanium alloy parts are determined, so as to decide the choice of cutting tool. For instance, the material of cutting tool should be related to the hardness, strength and temperature resistance of titanium alloy. Then, the cutting parameters such as the cutting speed and feed rate should be determined according to the geometry of the parts and the cutting tool. When turning of titanium alloy is carried out, the cutting fluid should be properly added.
Quality assessment
The machining quality of titanium alloys should be regularly checked to ensure the accuracy required by the parts. Checking the cutting quality mainly includes two aspects, one is to observe the surface quality of the parts, and the other is to check the tolerances of the machined parts. The common evaluation indicators include surface roughness, surface shape accuracy and dimensional accuracy.
Conclusion
The machining of titanium alloy is of great importance for many industries, so it is necessary to master the related cutting technology of titanium alloy. In order to improve cutting consumption, cutting tools and cutting fluids with reasonable parameters should be selected. Regular checks are also necessary to ensure the quality of machined parts.
